Keeno, I don't have answers for your questions until I get some Anentome helena for closer observation. I don't think they will eat each other though, but than again I might be wrong.
Get a few specimens, observe, and after write publicly, is the way to go.

Regards, Dusko

I was checking with Harro and he said that they aren't cannibalistic-don't eat their own kind.

I lost one of my A. helena. It was upside down and sticking out of the shell... Do you think the snail was trying to right itself and couldn't?

I have not seen any of the other three in awhile... which has me worried. They do like to bury themselves in the sand, so I'm hoping they are just hiding. I spent too much on these snails to have them all die on me... I wish I would've kept them in a species tank until they bred and then added some to my main tank..._________________Dumpster TankNano FishMbuna

thats s shame. I went to my LFS they HAD them, but they all died. I wanted one, but for now, I am busy trying to breed snails in quantity. I just don't want them breeding in my main tank._________________Sunstar's Seeker Sanctuary

He has some posted now 3 for $10, but won't ship to areas where night time temps getting below 50 and its taking 2 weeks to receiving them. I just ordered 12 from Tropical Fish Factory through another website. He is based in California.

Each snail will consume 4 snails a week, once there is no snails for it to eat you can feed them brine shrimp, blood worms and such like that. They do not eat each other from what I have read, but if there is no snails in the tank they will sometimes eat your cherries and other shrimp._________________47 tanks and still adding!
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